Convert feet to light-years
1 ft = 0.0000000000000000322173854211 ly — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
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Show this value in all 50 length units
- Gigameters Gm 3.048e-10
- Megameters Mm 0.000 000 304 8
- Kilometers km 0.000 304 8
- Hectometers hm 0.003 048
- Decameters dam 0.030 48
- Meters m 0.3048
- Decimeters dm 3.048
- Centimeters cm 30.48
- Millimeters mm 304.8
- Micrometers µm 304 800
- Nanometers nm 304 800 000
- Picometers pm 304 800 000 000
- Femtometers fm 304 800 000 000 000
- Inches in 12
- Feet ft 1
- Yards yd 0.333 333 333 333
- Miles mi 0.000 189 393 939 394
- Nautical miles nmi 0.000 164 578 833 693
- Thous thou 12 000
- Hands hh 3
- Links li 1.515 151 515 15
- Spans span 1.333 333 333 33
- Cubits cubit 0.666 666 666 667
- Ells ell 0.266 666 666 667
- Fathoms ftm 0.166 666 666 667
- Rods rd 0.060 606 060 606 1
- Chains ch 0.015 151 515 151 5
- Furlongs fur 0.001 515 151 515 15
- Leagues lea 0.000 063 131 313 131 3
- Barleycorns barleycorn 36
- US survey feet ft (US) 0.999 998
- US survey miles mi (US) 0.000 189 393 560 606
- Ångströms Å 3 048 000 000
- Microns µ 304 800
- Bohr radiuss a₀ 5 759 885 231.77
- Planck lengths ℓₚ 1.88584103375e+34
- Astronomical units au 2.03746215487e-12
- Light-years ly 3.22173854211e-17
- Light-seconds ls 1.01670336216e-9
- Light-minutes lmin 1.69450560361e-11
- Parsecs pc 9.87789527423e-18
- Kiloparsecs kpc 9.87789527423e-21
- Megaparsecs Mpc 9.87789527423e-24
- Solar radiuss R☉ 4.38119879258e-10
- Earth radiuss R🜨 4.78417830796e-8
- Point (DTP)s pt 864
- Picas pc 72
- Scandinavian miles mil 0.000 030 48
- Versts вер 0.000 285 714 285 714
- Lis 里 0.000 609 6
Every row is Foot (ft) converted through the meter, in exact rational arithmetic.
How to convert feet to light-years
Multiply the number of feet by 0.0000000000000000322173854211 to get light-years.
Foot: Exactly 0.3048 m, i.e. 12 international inches.
Light-year: Light travelling for one Julian year (365.25 days) in vacuum — exact, since both inputs are defined values.
Foot to Light-year conversion table
| Feet (ft) | Light-years (ly) |
|---|---|
| 1 ft | 3.2217385e-17 |
| 2 ft | 6.4434771e-17 |
| 3 ft | 9.6652156e-17 |
| 5 ft | 1.6108693e-16 |
| 10 ft | 3.2217385e-16 |
| 20 ft | 6.4434771e-16 |
| 25 ft | 8.0543464e-16 |
| 50 ft | 1.6108693e-15 |
| 100 ft | 3.2217385e-15 |
| 250 ft | 8.0543464e-15 |
| 500 ft | 1.6108693e-14 |
| 1000 ft | 3.2217385e-14 |
Light-year to Foot conversion table
| Light-years (ly) | Feet (ft) |
|---|---|
| 1 ly | 3.1039142e+16 |
| 2 ly | 6.2078284e+16 |
| 3 ly | 9.3117426e+16 |
| 5 ly | 1.5519571e+17 |
| 10 ly | 3.1039142e+17 |
| 20 ly | 6.2078284e+17 |
| 25 ly | 7.7597855e+17 |
| 50 ly | 1.5519571e+18 |
| 100 ly | 3.1039142e+18 |
| 250 ly | 7.7597855e+18 |
| 500 ly | 1.5519571e+19 |
| 1000 ly | 3.1039142e+19 |
Frequently asked
How many light-years are in a foot?
One foot equals 3.221738542e-17 light-years (ft → ly). That figure is exact, not rounded.
How do you convert feet to light-years?
Multiply the number of feet by 0.0000000000000000322173854211 to get light-years.
What is 1 ly in feet?
One light-year is 3.103914197e+16 feet.
What is 10 ft in ly?
10 ft = 3.2217385e-16 ly.
What exactly is a foot?
Exactly 0.3048 m, i.e. 12 international inches.
What exactly is a light-year?
Light travelling for one Julian year (365.25 days) in vacuum — exact, since both inputs are defined values.